Actually it makes a lot of sense. For an electron based browser the vast bulk of it is in the HTML/CSS/JS engine just like normal, but instead of doing the high

Actually it makes a lot of sense. For an electron based browser the vast bulk of it is in the HTML/CSS/JS engine just like normal, but instead of doing the higher level code and UI chrome in C++, you just use the same language and facilities which the engine itself already provides.